Raw data (data collected, calculating averages, averages of averages for experimental groups, qualitative observations) Had to measure pH to measure concentration to calculate the rate of reaction 200 seconds (lots of points, had to take average)-Took an average of the average of all three experimental group trials-Qualitative observationsInitially, the rhubarb extract varied in size and was a hard, brown solid, with a rough texture similar to a tree Initially, the ibuprofen tablets were all the same size, and were red/ pink in color. The surface was smoothAfter we grinded up each substance the particles were about the same size, and the same color. With the exception of ibuprofen with the remnants of the red/pink coating left in the mix We initially believed that the ibuprofen would dissolve faster and to a greater extent than the rhubarb, however each medicine exhibited similar reaction rates , with the ibuprofen dissolving to a greater extent than the rhubarbWhen the ibuprofen dissolved in HCl the solution turned a pink color, with the color becoming lighter as the volume increasesOn the other hand when the rhubarb dissolved in the HCl the solution turned a brown, murky color, and as the volume increased the solution became a little darker It did not take very long for the rhubarb to begin reacting with the HCl, and the particles sunk to the bottom of the beakerWhen we first put the ibuprofen in the beakers the particles tended to stay at the top of the solution, however over the course of experimentation they would sink to the bottom of the beaker
Data analysis (calculating the rate of reaction, graphs) -Calculated the concentration using 10 to the power of negative (whatever the pH is, manipulated the equation PH = minus the log the concentration of the hydrogen ions-From average calculate rate of reaction (concentration over time) -Graphed independent variable (volumes) and dependent variable (rate of reaction) -Created an exponential curve to show patterns in reaction rates among varying volumes, compare them -Both had slightly higher pH levels than average pH level of HCl (0.89 compared to 0.84-talk about taking out outlier to create exponential line of best fit -Maura + Sarah
Conclusion (weaknesses, improvements that should be made) -Sarah + Ciera
